 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.externaltools.internal.launchConfigurations;

 import java.util.Comparator ;

 public class IgnoreWhiteSpaceComparator implements Comparator {

     /* (non-Javadoc)
      * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
      */
     public int compare(Object o1, Object o2) {
         String one= (String )o1;
         String two= (String )o2;
         int i1 = 0;
         int i2 = 0;
         int l1 = one.length();
         int l2 = two.length();
         char ch1 = ' ';
         char ch2 = ' ';
         while (i1 < l1 && i2 < l2) {
             while (i1 < l1 && Character.isWhitespace(ch1 = one.charAt(i1))) {
                 i1++;
             }
             while (i2 < l2 && Character.isWhitespace(ch2 = two.charAt(i2))) {
                 i2++;
             }
             if (i1 == l1 && i2 == l2) {
                 return 0;
             }
             if (ch1 != ch2) {
                 return -1;
             }
             i1++;
             i2++;
         }
         return 0;
     }
 }

